摘要:
The invention relates to device for manufacturing, filling and sealing thermoplastic sacks that are open on one side. Said device comprises a first welding and severing station for forming the sack with a bottom weld, a filling station and a second welding station for sealing the sack and comprises a first pair of gripping pliers as the pair of transport gripping pliers for accepting the sack at the first welding station; a second pair of gripping pliers that are arranged stationarily at the filling station; and a third pair of gripping pliers as the pair of transport gripping pliers that transport the sack from the filling station to the second welding station. The invention provides a fourth pair of gripping pliers as the pair of transport gripping pliers that accepts the sack from the first pair of transport gripping pliers through the in-line arrangement of a stationary pair of gripping pliers and delivers to the pair of gripping pliers, which are arranged stationarily at the filling station. Said fourth pair of gripping pliers assumes a delivery position to deliver the sack to the pair of gripping pliers that is arranged stationarily at the filling station and that lies in a plane that is higher by a distance (x) than its acceptance position for the sack.
摘要:
A method for repetitively making, filling and sealing sacks from a tubular web of thermoplastic material preferably provided with side folds, wherein, for each sack, the leading end of the tubular web is provided with a transverse weld, and from the tubular web a section constituting an open sack is cut off, and where the sack is then filled and the open side of the sack is closed by means of a transverse weld. To ensure that the filled sacks are always filled tight and full, during the filling of the sack, there is detected by means of a measurement pick-up to what level the sack is filled when filling with a certain quantity of filling material, and that in accordance with the filling level of the sack the length of the tubular web section forming the sack is adjusted.
摘要:
A piston-cylinder unit causes a web of closure tape material to be withdrawn from a supply reel in steps equal to the width of each closure tape required for closing the folded-over flattened mouth end of a large sack. Each tape is severed from the leading web end by a knife and engaged by a suction bar which is swung together with two welding bars onto an inclined support for the folded-over mouth end.
摘要:
Conveying means which are intermittently rotatable in equal steps take flattened sacks successively from supply means through one step to filling means which are effective to open each sack and fill it, whereupon the conveying means move a further step to take the sack to welding means. Said conveying means comprise two parallel discs turned in synchronism about horizontal shafts which are directed outwardly to define a free passage between the discs. Confronting tongs on the discs are displaceable towards and away from one another to engage the sack at both sides of its mouth at the supply means and convey it up to the welding means at which they deposit the filled sack on a discharge conveyor, the tongs being lowerable towards said discharge conveyor to an extent such that the upper region of each sack becomes buckled.
摘要:
To form stacks of flat folded bags, each bag comprising a mouth portion reinforced by at least one additional ply of bag material, the mouth portion and the base portion are both folded onto the central bag portion about respective fold lines so that their adjacent edges stop short of one another or just touch. The mouth portion is folded about a fold line disposed beyond the reinforcement. The base portion is either folded once about a fold line disposed inwardly of a gusset formed in the base or, if there is no gusset, in Z formation about two fold lines.
摘要:
A process for manufacturing a bag from a polymer and/or metal film material provides a bag that has four outer walls connected by four seams and that has a sealed lower end.The bag-forming material is fed in the form of a film web that is wound up on a roll to an unwinding station of a bottom forming device that separates the unwound film web into film segments, connects the film segments, and seals at least one end of the connected segments to form the bag.
摘要:
An apparatus for filling sacks is disclosed which has opposed clamps for engaging the initially collapsed sacks adjacent to the side portions of their opening-defining edges, suction devices included in the clamps, which engage mutually opposite side walls of the sacks adjacent to their opening-defining edges and pull said side walls apart, and a filling pipe. The carriers for the suction devices are provided each on each side of the sack at least below the suction device or suction devices with a transversely extending bar, which is made of elastomeric material and urges the pulled apart edge portions of the sacks into sealing contact with the side walls of the filling funnel.
摘要:
Apparatus for closing filled sacks, which have been transferred from a filling station to a take-over station and a closing station by a conveyor comprising a gripper, which like pliers grips the flattened lips of the filled sacks. A pair of gripping rollers, which are rotatable about axes which are at right angles to the main axis of the sack, take-over the sacks at the take-over station with the lips protruding. The apparatus also comprises a welding or sewing machine to act on the protruding lips to form a seam for closing the filled sacks. At least one of the gripping rollers is rotated as the filled sacks are conveyed to the closing machine to force the lips to protrude sufficiently to facilitate making the closing seam.
摘要:
Apparatus for aligning a sack disposed at the leading end of a series of shingled sacks, which have been unwound from a roll of shingled sacks and which have openings at their leading ends. The sack is aligned by transversely spaced gripping rollers that are operable to align the leading edge of a sack for proper orientation prior to transfer of the sack to a filling apparatus. An intermittently driven conveyor belt conveys the unwound series of shingled sacks as they are unwound from a roll. At least one pressure-applying roller is disposed above the conveyor belt and acts on the leading sack of the series of shingled sacks and cooperates with a backing roller, which is adapted to be driven, and optional pressure-applying elements, which are adapted to be lowered onto the next following sack.
摘要:
Apparatus for closing filled sacks, preferably large sacks, which consist at least in part of thermoplastic material, comprises a feeder for feeding the filled sacks into a closing station. The feeder preferably comprises a roller conveyor or a belt conveyor. The apparatus also comprises means for holding the top end portion the sack above the contents of the sack, pressure-applying bars, which are parallel to each other and adapted to be lowered onto the contents of the sack on both sides of the sack end portion, which is held taut, which pressure-applying bars when in a lower position define between them a gap for the passage of the sack between said bars, and closing means provided above the pressure-applying bars. The closing means comprise welding bars and backing bars, which engage the sack end portion between the end-holding means and the pressure-applying bars and are disposed on opposite sides of said sack end portion. That of the pressure-applying bars which is disposed on the trailing side of the sack is provided with adhesive discharge nozzles directed toward the upper wall portion of the sack in contact with the contents of the sack, and that of said pressure-applying bars which is disposed on the leading side of the sack comprises a folding edge or folding rod, which faces the end of the sack. When the end seam weld has been formed and the welding and backing bars have released the sack and the conveyor has subsequently been restarted said folding edge or folding rod causes the end portion of the sack to be folded down onto and forced against the flattened upper portion of the trailing wall of the sack.